- Joined
- Jun 30, 2012
- Messages
- 13,985
I suggest that even with four stroke motors there are Kadency effects. The porting is not only about flow, you can think about it as being two connected organ pipes - the whole inlet, conbustion chamber and exhaust system resonates at a frequency which is in proportion to the speed of sound divided by the revs. Gas flow is about smoothing out bumps, but it doesn't really provide a prediction of what will happen when a motor is running at high revs. The proof of the pudding is always in the eating.